Abstract: This paper presents a systematic design procedure for hysteresis modulation based sliding mode control of DC-DC buck converter in continuous conduction mode. SM control is a type of nonlinear control which has been developed primarily for the control of variable structure systems. It has a high degree of flexibility in its design choices; the SM control technique is relatively easy to put into practice as compared to other nonlinear control methods. The design method and mathematical modeling for the Buck Converter has been explained. In this paper the sliding coefficient for the controller has been chosen based on satisfying the hitting, existence and stability conditions. The controller equations for buck converter have been resultant and modeled using MATLAB/SIMULINK.

Keywords: Sliding Mode Control, Sliding coefficient, Buck Converter, Modeling, Hysteresis modulation.